JP6587013B1 - Rail mounting structure for electrical equipment - Google Patents

Abstract

The present invention provides a rail mounting structure for an electric device that can easily mount and remove the rail of the electric device by enabling the operation of the slider without removing the terminal cover covering the terminal block from the main body case. . An electric device includes a terminal cover that covers a terminal block on the outside of a main body case. An engagement protrusion 26 that engages with one rail side edge 23 a of the pair of rails 23 is provided on the bottom 24 of the main body case 2. A slider 28 is disposed on the bottom of the main body case and the bottom 29 of the terminal cover. A spring biasing force is applied to the slider by a spring member 27 in a direction toward the other rail side edge. The slider is provided with an engaging claw 31 at one end in the longitudinal direction, the other end in the longitudinal direction extends to the cover outer wall 19 of the terminal cover, and the operation portion 33 is provided at the other end. Yes. [Selection] Figure 3

Description

  The present invention relates to a rail mounting structure for an electric device that locks an electric device such as a circuit breaker, an electromagnetic contactor, or a relay to a rail laid in a switchboard or control panel.

  The circuit breaker is provided with a power supply side terminal block and a load side terminal block having external terminals on the power supply side and the load side of the main body case. Inside the main body case are the main circuit contacts, an overcurrent trip device that operates the main circuit contacts in a trip state, and a toggle mechanism that operates the main circuit contacts. The base is connected to the power supply side contact and the load side contact of the main circuit contact.

  As a structure for locking this circuit breaker to a top-hat rail laid in a panel of a switchboard or a control panel, for example, a structure of Patent Document 1 is known.

  In Patent Document 1, a hook-shaped engagement protrusion is formed at the bottom of a main body case of a circuit breaker, and a long slider that is spring-biased by a spring member toward the engagement protrusion is It is mounted along the longitudinal direction.

  The slider has an engaging claw formed at one end in the longitudinal direction and an operating portion provided with an operating hole at the other end in the longitudinal direction. When the slider is attached to the bottom of the main body case, the operating portion becomes the bottom of the case main body. It is located at one end.

  The top hat-shaped rail is a rail having a U-shaped cross section, and a pair of rail side edges on both sides project in an overhang shape. The main body case is arranged so as to be orthogonal to the longitudinal direction of the rail, the engaging protrusion of the main body case is hooked on one rail side edge of the rail, and the slider engaging claw is hooked on the other rail side edge. By hooking, the circuit breaker is locked across the rail.

  And when removing the circuit breaker from the rail, insert the blade edge of the driver into the operation hole of the operation part located at one end of the bottom of the main body case, and apply an external force to the slider in the direction away from the engaging protrusion. . As a result, the slider is moved away from the engaging projection to release the slider engaging claw from the other rail side edge, and the circuit breaker is removed from the rail.

Japanese Patent Laid-Open No. 2006-40971

  By the way, the circuit breaker covers the power-side terminal block and the load-side terminal block in order to prevent the fingers from coming into contact with the power-side terminal block and the load-side terminal block with the electric wires connected to the external terminals. The terminal cover may be detachably attached to the main body case.

  When the structure for attaching the terminal cover to the main body case is applied to the circuit breaker of Patent Document 1 having a rail mounting structure, there are problems in the following aspects.

  That is, an operation part of the slider is located at one end of the bottom part of the main body case, and when removing the circuit breaker from the rail, first, an operation of removing the terminal cover from the main body case has to be performed.

  Thus, when removing the circuit breaker from the rail or when mounting the circuit breaker on the rail, it is necessary to remove the terminal cover first, so it takes time to install and remove the circuit breaker rail. It was the current situation.

  Accordingly, the present invention provides a rail mounting structure for an electric device that can be easily mounted and removed from the rail by allowing the slider to be operated without removing the terminal cover covering the terminal block from the main body case. I will provide a.

  In order to achieve the above object, the rail mounting structure for an electric device according to the present invention includes an electric device in which a terminal block is provided on both sides of the main body case, and a terminal cover that covers the terminal block is detachably attached to the main body case. This is a rail mounting structure for an electric device that is locked over a top hat-shaped rail having a U-shaped cross section and having a pair of rail side edges on both sides. This structure is provided at the bottom of the main body case, and engages with one of the pair of rail side edges, and the bottom of the main body case and the bottom of the terminal cover along the attachment / detachment direction of the terminal cover. A long slider supported so as to be movable toward the other of the rail side edges, and a spring member that applies a spring biasing force to the slider in a direction toward the other of the pair of rail side edges. I have. The slider is provided with an engaging claw that engages the other of the pair of rail side edges by the spring biasing force of the spring member at one end in the longitudinal direction, and the other end in the longitudinal direction is the terminal cover. The other end is provided with an operation portion for moving the slider to the outside of the cover outer wall and releasing the engagement with the other of the pair of rail side edges and the engaging claw. ing.

  According to the rail mounting structure for an electric device according to the present invention, it is possible to easily mount and remove the rail of the electric device by enabling the operation of the slider without removing the terminal cover covering the terminal block from the main body case. Can do.

It is a perspective view which shows the circuit breaker with which the terminal cover which concerns on this invention was mounted | worn to the main body case. It is a perspective view which shows the connection tool for wiring provided with the terminal cover which concerns on this invention. It is a figure which shows the state which attached the circuit breaker to the rail arrange | positioned in the panel of the switchboard which concerns on this invention, or a control panel. It is a figure which shows the shape of the bottom part of the circuit breaker equipped with the slider which concerns on this invention. It is a perspective view which shows the shape of a slider. It is a figure which shows the state by which the slider is mounted | worn with the bottom part of the main body case and the terminal cover. (A) is an AA arrow directional view of FIG. 6, (b) is a BB arrow directional view of FIG. It is a figure which shows the state which moved the slider with which the bottom part of the main body case and the terminal cover was moved, and the linear spring was elastically deformed. (A) is a state in which the circuit breaker is mounted on the rail, and (b) is a diagram showing a state in which the circuit breaker is removable from the rail.

  Next, a first embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

The first embodiment described below exemplifies an apparatus and method for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, and structure of component parts. The arrangement is not specified below. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.
[First Embodiment]

  FIG. 1 is a perspective view showing a circuit breaker 1 as an electric device. In FIG. 1, three directions orthogonal to each other in the space are defined as a longitudinal direction, a width direction, and a height direction of the circuit breaker 1 for convenience.

  The circuit breaker 1 has a three-pole main circuit contact (not shown) in the body case 2 and an overcurrent trip that operates the main circuit contact in a trip state when an overcurrent flows due to a short circuit accident or the like. An apparatus (not shown) and a toggle link mechanism (not shown) for opening and closing the main circuit contact are disposed.

  One end side in the longitudinal direction of the circuit breaker 1 is a power source side (primary side or line side), and the wiring connection device 3 is detachably attached to a contact terminal on the three-pole main power source side. Moreover, the other end side of the circuit breaker 1 in the longitudinal direction is a load side (secondary side or load side), and a connection tool 4 for wiring is detachably attached to a contact terminal on the load side.

  A lever opening 5 is formed on one surface of the circuit breaker 1 in the height direction (hereinafter referred to as an upper surface), and an operation lever 6 for operating the toggle link mechanism projects from the lever opening 5 to the outside. ing.

  When the operation lever 6 protrudes from one end in the longitudinal direction of the lever opening 5 as shown in FIG. 1, the toggle link mechanism closes the main circuit contact (ON position), and the operation lever 6 opens the lever. When protruding to the other end side in the longitudinal direction of the portion 5, the toggle link mechanism opens the main circuit contact (OFF position).

  As shown in FIG. 2, the load-side wiring connection device 4 is attached to and detached from the main body case 2 in a state in which the terminal module 7 is connected to the main circuit contact inside the main body case 2 and the terminal module 7 is covered and insulated. And a terminal cover 8 that is freely mounted.

  The terminal module 7 includes a terminal block 9 provided with an electric wire insertion space 9a into which an end of an electric wire is inserted, and the terminal block 9 and is attached to the terminal block 9 and has a contact portion (not fixed) along the direction in which the electric wire in the electric wire insertion space 9a is inserted. And a leaf spring 11 having a bent portion assembled in the terminal block 9 and disposed in the electric wire insertion space. The terminal module 7 is configured as a spring terminal that presses and connects the tip of the electric wire inserted into the electric wire insertion space 9 a to the contact portion by the elastic force generated by the leaf spring 11.

  The terminal block 9 forms three wire insertion spaces 9a, and the contact portions of the three terminal plates 10 and the leaf springs 11 are arranged in each of the wire insertion spaces 9a.

  The three terminal boards 10 are formed with terminals 12 provided with screw holes 12a, and the contact terminals provided with the above-described tripolar main circuit contact screw holes are provided on the terminals 12 of the terminal boards 10. Connected via screws.

  As shown in FIG. 2, the terminal cover 8 includes a cover main body 15 that houses the terminal module 7, and a cover lid 16 that is an outer wall of the cover main body 15 and covers the electric wire insertion space 9 a of the terminal module 7. Yes.

  As shown in FIG. 1, the cover lid body 16 has three wire insertion ports 17 formed at predetermined intervals in the width direction, and is close to each wire insertion port 17 in the longitudinal direction. Three tool insertion holes 18 are formed at the positions.

  A slider operation recess 20 is formed on the side wall 19 of the cover body 15 facing in the longitudinal direction by cutting out a part of the side wall 19.

  By attaching the terminal cover 8 to the main body case 2, the three wire insertion openings 17 and the tool insertion holes 18 formed in the cover lid 16 face the three wire insertion spaces 9 a of the terminal module 7.

  When the electric wire is inserted into the electric wire insertion space 9a from the electric wire insertion port 17, the leaf spring 11 that is elastically deformed by contacting the tip of the electric wire generates an elastic force toward the contact portion of the terminal plate 10, thereby Connect the tip of the wire by pressing it against the contact.

  Further, as shown in FIG. 1, the power supply side wiring connection device 3 covers a terminal module (not shown) having substantially the same structure as the terminal module 7 of the load side wiring connection device 4 and covers this terminal module. And a terminal cover 21 that is detachably attached to the main body case 2 in a state of being insulated and protected.

  On the other hand, FIG. 3 shows the circuit breaker 1 that is locked to a top-hat rail 23 laid on the switchboard 22, and FIG. 4 shows the bottom 24 of the body case 2 of the circuit breaker 1 and the load side. The rail attachment part 25 provided in the bottom part 29 of the terminal cover 15 of the connection tool 4 for wiring is shown.

  The top hat-shaped rail 23 has a shape in which a pair of rail side edge portions 23a and 23b project in an overhang shape from both sides of a U-shaped cross section.

  As shown in FIG. 4, the rail mounting portion 25 has a hook-shaped engaging projection 26 formed on one side of the bottom 24 in the longitudinal direction (position close to the power supply side wiring connection device 3). .

  Further, the slider 28 on which the spring urging force of the linear spring 27 acts toward the engaging protrusion 26 is located on the other side in the longitudinal direction of the bottom 24 of the main body case 2 (on the load-side wiring connection device 4). Position) and the bottom 29 of the terminal cover 8 (cover body 15).

  As shown in FIG. 5, the slider 28 is a member formed by pressing a metal plate, and includes a slider main body 30, a pair of engagement claws 31, an operation portion 33, a pair of spring support portions 35, and a pair. The first slide part 36 and a pair of second slide parts 37 are provided.

  The slider body 30 is a long flat plate-shaped portion, and a pair of engaging claws 31 rises at right angles from both ends in the width direction of one end of the slider body 30.

  The operation unit 33 is formed on the same plane at the other end of the slider body 30, and has a rectangular operation hole 32.

  The pair of spring support portions 35 are formed to rise at right angles from both ends in the width direction at the center in the longitudinal direction of the slider body 30, and a spring insertion hole 34 is formed in each.

  The pair of first slide portions 36 rises in an inverted L-shaped cross section from both ends in the width direction of the slider main body 30 between the spring support portion 35 and the engaging claws 31. Here, the slide pieces 36a extending in parallel with the slider main body 30 of the pair of first slide portions 36 extend in directions away from each other.

  In addition, the pair of second slide portions 37 rises in an inverted L shape in cross section from both ends in the width direction of the slider body 30 between the spring support portion 35 and the operation portion 33, and the sliders of these second slide portions 37. The slide pieces 37a extending in parallel to the main body 30 extend in directions away from each other.

  As shown in FIGS. 6, 7A and 7B, the slider 28 having the above configuration is supported by the slide piece 36a of the first slide portion 36 on the first guide portion 38 formed on the bottom portion 24 of the main body case 2. The second guide portion 39 formed on the bottom portion 29 of the terminal cover 8 is movable in the longitudinal direction while the slide piece 37a of the second slide portion 37 is supported.

  As shown in FIG. 7A, the first guide portion 38 is formed to project in a L-shaped cross section along the longitudinal direction of the bottom portion 24 of the main body case 2, and is a support piece parallel to the bottom portion 24. 38 a receives the slide piece 36 a of the first slide portion 36. The first guide portion 38 is formed continuously to both ends in the longitudinal direction.

  As shown in FIG. 7B, the second guide portion 39 is formed so as to protrude in a L-shaped cross section along the longitudinal direction of the bottom portion 29 of the terminal cover 8, and is a support piece parallel to the bottom portion 29. 39 a receives the slide piece 37 a of the second slide portion 37. The second guide portion 39 is formed in an L-shaped cross section from one end in the longitudinal direction on the first guide portion 38 side, and is not formed in an L-shaped cross section on the other end in the longitudinal direction. A stopper wall 40 is formed so as to close the second guide portion 39.

  The linear spring 27 shown in FIGS. 4 and 6 is inserted into the spring insertion holes 34 of the pair of spring support portions 35 of the slider 28 shown in FIG. Both end portions of the linear spring 27 extending in a direction orthogonal to the slider main body 30 of the slider 28 are engaged with spring engaging concave portions 41 and 42 provided on the bottom portion 24 of the main body case 2.

  Then, the slider 28 in which the first slide portion 36 is supported by the first guide portion 38 of the bottom portion 24 of the main body case 2 and the second slide portion 37 is supported by the second guide portion 39 of the bottom portion 29 of the terminal cover 8, As shown in FIG. 6, the spring biasing force of the linear spring 27 engaged with the spring engaging recesses 41 and 42 of the bottom 24 causes a pressing force in the direction toward the engaging protrusion 26 (see FIG. 4). It is working.

  Here, as shown in FIG. 1, the operation portion 33 of the slider 28 is arranged in a state where the operation hole 32 is opened in the slider operation recess 20 formed in the side wall 19 of the terminal cover 8 (cover body 15). .

  The terminal block described in the present invention corresponds to the terminal module 7, and the cover outer wall described in the present invention corresponds to the cover side wall 19 and the slider operation recess 20, and is described in the present invention. The engaging protrusions corresponding to the engaging protrusions 26, the spring member described in the present invention corresponds to the linear spring 27, and a pair of engaging claws described in the present invention. The operation portion described in the present invention corresponds to the operation portion 33 provided with the operation hole 32 of the slider 28, and the slide portion described in the present invention is the first. The guide portion described in the present invention corresponds to the first slide portion 36 and the second slide portion 37, and corresponds to the first guide portion 38 and the second guide portion 39, and is described in the present invention. The stopper wall corresponds to the stopper wall 40 .

  Next, with reference to FIGS. 9A and 9B, an operation of removing the circuit breaker 1 mounted on the top-hat rail 23 of the switchboard 22 from the rail 23 will be described. 6 and 8 are also referred to.

  FIG. 9A shows a state where the circuit breaker 1 is mounted on the rail 23. In this figure, the engagement projection 26 of the bottom 24 of the main body case 2 is engaged with one rail side edge 23 a of the rail 23, and the rail attachment edge 25 of the rail 23 is engaged with the other rail side edge 23 b of the rail 23. The engaging claw 31 of the slider 28 is in contact. Then, as shown in FIG. 6, the slider 28 is pressed against the engaging projection 26 by the spring biasing force of the linear spring 27, so that the engaging claw 31 is engaged with the rail side edge 23b. The circuit breaker 1 is attached to the rail 23.

  Next, in order to remove the circuit breaker 1 from the rail 23, a screwdriver (not shown) is inserted into the operation hole 32 of the operation portion 33 of the slider 28 located in the slider operation recess 20 of the cover body 15, and FIG. As shown in b), the entire slider 28 is moved to the outside of the side wall 19 of the terminal cover 8 together with the operation portion 33.

  At this time, in the slider 28, the slide piece 36 a of the first slide portion 36 slides on the support piece 38 a of the first guide portion 38 of the main body case 2, and the slide piece 37 a of the second slide portion 37 is connected to the terminal cover 8. It slides on the support piece 39 a of the second guide portion 39 of the (cover body 15) and moves to the outside of the side wall 19 of the terminal cover 8. At this time, as shown in FIG. 8, the linear spring 27 is greatly deformed into an arc shape.

  Then, as shown in FIG. 9B, the circuit breaker 1 can be removed from the rail 23 by the engagement claw 31 of the slider 28 being separated from the other rail side edge 23 b of the rail 23.

  Here, immediately after the engaging claw 31 of the slider 28 is separated from the other rail side edge 23 b of the rail 23, the terminal cover so that the end of the slide piece 37 a of the slider 28 closes the second guide portion 39. 8 (cover main body 15) abuts on a stopper wall 40 provided.

  When the circuit breaker 1 is mounted on the rail 23, first, the operation of FIG. 9B is performed, and then the operation of FIG. 9A is performed.

  Next, effects of the first embodiment will be described.

  When the circuit breaker 1 is removed from the rail 23 or when the circuit breaker 1 is mounted on the rail 23, first, the operation portion 33 of the slider 28 located on the side wall 19 of the terminal cover 8 is used, and the entire slider 28 is used. Is moved to the outside of the side wall 19 of the terminal cover 8. When the circuit breaker 1 is removed from the rail 23, the engagement claw 31 of the slider 28 is disengaged from the rail side edge 23b, and when the circuit breaker 1 is mounted on the rail 23, the wire By moving the entire slider 28 to the rail side edge 23b side by the spring biasing force of the shaped spring 27, the engagement claw 31 of the slider 28 is pressed and engaged with the rail side edge 23b.

  Thus, when the circuit breaker 1 is removed from the rail 23 or attached, it is not necessary to remove the terminal cover 15 of the load-side wiring connection device 4 from the main body case 2. The operation of detaching from the rail 23 can be easily performed.

  When the slider 28 moves to the outside of the side wall 19 of the terminal cover 8, the linear spring 27 is deformed as shown in FIG. 8, but the second slide portion 37 of the slider 28 is moved to the terminal cover 8. When the slider 28 abuts on the stopper wall 40, movement of the slider 28 to the outside is restricted, and excessive deformation of the linear spring 27 is prevented. As a result, the linear spring 27 can be prevented from being excessively deformed without increasing the diameter of the wire and securing the material strength, so that the durability of the linear spring 27 can be improved.

  The slider 28 is a metal plate in which the first slide portion 36 and the second slide portion 37 are formed by pressing at both ends in the width direction of the slider body 30. The first slide portion 36 and the second slide portion 37 are deformed. It is processed into an L-shaped cross section that is difficult to perform. Therefore, sufficient rigidity of the slider 28 can be ensured.

In addition, although this embodiment demonstrated application to the circuit breaker 1, it is not limited to this.
Although the present invention has been described with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Main body case 3 Wiring connector 4 Wiring connector 5 Lever opening 6 Operation lever 7 Terminal module 8 Terminal cover 9a Electric wire insertion space 9 Terminal block 10 Terminal plate 11 Leaf spring 12a Screw hole 12 Terminal 15 Cover Main body 16 Cover lid 17 Electric wire insertion port 18 Tool insertion hole 19 Side wall 20 Slider operation recess 21 Terminal cover 22 Switchboard 23 Rail 23a, 23b Rail side edge 24 Body case bottom 25 Rail mounting portion 26 Engaging projection 27 Linear Spring 28 Slider 29 Terminal cover bottom 30 Slider body 31 Pair of engaging claws 32 Operation hole 33 Operation part 34 Spring insertion hole 35 Spring support part 36 First slide part 36a Slide piece 37 Second slide part 37a Slide piece 38 First Guide part 38a Support piece 39 Second guide part 39a Support piece 40 Stock Over the wall 41 and 42 spring engagement recess

Claims (5)

A terminal block is provided on both sides of the main body case, and an electric device in which a terminal cover covering the terminal block is detachably attached to the main body case has a U-shaped cross section and a pair of rail side edges on both sides. A rail mounting structure for electrical equipment that is locked over a top-hat rail,
An engagement protrusion provided on the bottom of the main body case and engaged with one of the pair of rail side edges;
A long slider supported on the bottom of the main body case and the bottom of the terminal cover so as to be movable toward the other of the pair of rail side edges along the attaching / detaching direction of the terminal cover;
A spring member that exerts a spring urging force in a direction toward the other of the pair of rail side edges with respect to the slider,
The slider is provided with an engaging claw that engages the other of the pair of rail side edges by a spring biasing force of the spring member at one end in the longitudinal direction, and the other end in the longitudinal direction is The terminal cover extends to the cover outer wall, and at the other end, the slider is moved to the outside of the cover outer wall to disengage the other of the pair of rail side edges and the engagement claw. A rail mounting structure for an electric device, characterized in that an operating portion is provided. The slider protrudes from both ends in the width direction of the long slider body, and a slide portion extending in the longitudinal direction is formed.
The electric device according to claim 1, wherein a guide portion that receives the slide portion and movably supports the slider is formed on the bottom portion of the main body case and the bottom portion of the terminal cover. Rail mounting structure.   The electric device according to claim 2, wherein the slide portion of the slider is formed by bending a metal flat plate into an L shape from both ends in the width direction of the slider body. Rail mounting structure.   A slider restricting portion for restricting further movement of the slider to the outside of the outer wall of the cover when the engagement between the other of the pair of rail side edges and the engaging claw is released; The rail mounting structure for an electric device according to any one of claims 2 and 3.   The slider restricting portion is a stopper wall provided on the terminal cover, and when the engagement with the other of the pair of rail side edge portions and the engaging claw is released, one of the sliding portions of the slider. 5. The rail mounting structure for an electric device according to claim 4, wherein the portion abuts against the stopper wall to restrict the slider from further moving to the outside of the cover outer wall.

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